modelbenchmark.io

GPT 5.1 Codex

OpenAI · gpt-5-1-codex

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Codex GPT for repository edits, code review, and practical software agents

Specification

openai listing

Context
272K
Max output
128K
Released
2025-11-13
Knowledge cutoff
2024-09-30
Retires
2026-07-23
Open weights
no
Input
text, image
Output
text

Price

US dollars per million tokens · openai list price

Input
$1.25
Output
$10.00
Cache read
$0.125

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Priority inputazure$2.50
Priority outputazure$20.00

Quality

1 benchmark · 1 source

Composite
77th
percentile of 334 scored models
Rank
78 / 334
±0.10 sd
Evidence
1 × 1
too little evidence to place with confidence
Effort range
one configuration only
coding59th1/3 bench

Every score

one row per source and configuration — nothing averaged away

BenchmarkScoreConfigurationSourceRun
SWE-Bench verified66.0medium · mini-SWE-agentSWE-bench

The leading figure for a benchmark is the median across its configurations, so one heroic high-effort run cannot set the number.

Available from 20 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
openaivendor$1.25$10.00$0.125272K128K2026-07-23
opencode$1.07$8.50$0.107400K128K
poe$1.10$9.00$0.11400K128K
jiekou$1.125$9.00400K128K
abacus$1.25$10.00$0.125400K128K
aihubmix$1.25$10.00$0.125400K128K
azure
$1.25
$1.38
$10.00
$11.00
$0.125
$0.14
400K
272K
128K2027-05-15
azure-cognitive-services$1.25$10.00$0.125400K128K
edenai$1.25$10.00$0.125272K128K
helicone$1.25$10.00$0.125400K128K
impossibl$1.25$10.00$0.125400K128K
kilo$1.25$10.00$0.13400K128K
llmgateway$1.25$10.00$0.125400K128K
llmgateway-providers$1.25$10.00400K272K
nano-gpt$1.25$10.00$0.125400K128K
openrouter$1.25$10.00$0.13400K128K
orcarouter$1.25$10.00$0.125400K128K
vercel$1.25$10.00$0.13400K128K
vivgrid$1.25$10.00$0.125400K128K
zenmux$1.25$10.00$0.12400K64K

Price history

append-only observations · a listing writes a row only when its price moves

DateHostField$/M
2026-09-02openrouterCache read$0.13
2026-09-06openrouterCache read$0.13
2026-09-02openrouterInput$1.25
2026-09-06openrouterInput$1.25
2026-09-02openrouterOutput$10.00
2026-09-06openrouterOutput$10.00

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